Monitoring Fault Coordination in Transmission Line System via MATLAB

Abstract

Current faults finding method used taking a long time to locate the fault location since the implementation of distance relay as a protection system in transmission line only gives the range of the fault area but not the exact location. Locating exact fault in a transmission line is crucial in determining the efficiency of the power system network since fast restoration and clearing fault is the priority in maintaining the flow of power supply. Thus, to locate the exact location, distance relay schemes are implemented in the network system. In this paper, enhancement of distance relay scheme determining the precise location of fault area in the transmission line by using the algorithm of the distance relay. Apparent impedance is the determinant value in this study. The variables that consist of 33 fault location ranges from 1km to 300 km, and ten types of faults are executed. Detected fault location distance is collected for the data analysis to determine the implemented distance relay's accuracy at the fault location. The simulation proved that the distance relay schemes could locate a more accurate location for detecting single line faults and double faults. The three-line faults showed accuracy for the long-distance transmission line ranging from 100 km200 km. In the future, the distance location can be integrated into the system for controlling purposes, not only for monitoring purposes.